Purification of eutrophic wastewater by Cyperus alternifolius,Coleus blumei and Jasminum sambac planted in a floating phytoremediation system

Abstract

Abstract: In a greenhouse study,Cyperus alternifolius,Coleus blumei and Jasminum sambac were cultured in a floating phytoremediation system with plantation cups inserted into a polyfoam plate that floated in the upper part of a tank filled with 100 L domestic wastewater.The contents of chemical oxygen demand (COD_Cr),total P (T-P),total N (T-N),soluble P(S-P),ammonia-nitrogen (NH₄⁺-N) and nitrate-nitrogen (NH₃^--N) in the domestic wastewater were tested during the growth of these three plants.The results showed that Cyperus alternifolius and Coleus blumei could grow well in the floating phytoremediation system,their dry weight being 285.8% and 371.4% of the initial weight of planting,respectively,but Jasminum sambac could not grow well,being 125.0% of the initial weight of planting.The removal rate of TN by these 3 plants was 68.0%,62.0% and 45.0%,and that of NH₃^--N,COD_Cr and TP was 98.0%,80.0% and 92.0%,78.0%,66.0% and 55.0%,and 90.6%,90.5% and 88.0% respectively.Cyperus alternifolius and Coleus blumei had good effects on the removal of pollutants in the floating phytoremediation system.

Key words: Cyperus alternifolius, Coleus blumei, Jasminum sambac, Floating phytoremediation system, Eutrophic wastewater, Purification

CLC Number:

S682

LIU Shizhe, LIN Dongjiao, TANG Shujun, LUO Jian. Purification of eutrophic wastewater by Cyperus alternifolius,Coleus blumei and Jasminum sambac planted in a floating phytoremediation system[J]. Chinese Journal of Applied Ecology, 2004, (7): 1261-1265.

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